Instalar os pacotes

install.packages('dplyr')
install.packages('plotly')

Carregar a biblioteca

library(plotly)
Loading required package: ggplot2

Attaching package: ‘plotly’

The following object is masked from ‘package:ggplot2’:

    last_plot

The following object is masked from ‘package:stats’:

    filter

The following object is masked from ‘package:graphics’:

    layout
library(dplyr)

Attaching package: ‘dplyr’

The following objects are masked from ‘package:stats’:

    filter, lag

The following objects are masked from ‘package:base’:

    intersect, setdiff, setequal, union

Carregar o dataset

wines_dt <- read.csv2("wines.csv", row.names=1)

Obter os dados de vinho branco

wines_dt.white_wines <- wines_dt %>% filter(Vinho == 'WHITE')
summary(wines_dt.white_wines)
  fixedacidity    volatileacidity    citricacid     residualsugar      chlorides      
 Min.   : 3.800   Min.   :0.0800   Min.   :0.0000   Min.   : 0.600   Min.   :0.00900  
 1st Qu.: 6.300   1st Qu.:0.2100   1st Qu.:0.2700   1st Qu.: 1.700   1st Qu.:0.03600  
 Median : 6.800   Median :0.2600   Median :0.3200   Median : 5.200   Median :0.04300  
 Mean   : 6.855   Mean   :0.2782   Mean   :0.3342   Mean   : 6.387   Mean   :0.04577  
 3rd Qu.: 7.300   3rd Qu.:0.3200   3rd Qu.:0.3900   3rd Qu.: 9.900   3rd Qu.:0.05000  
 Max.   :14.200   Max.   :1.1000   Max.   :1.6600   Max.   :45.800   Max.   :0.34600  
 freesulfurdioxide totalsulfurdioxide    density             pH          sulphates     
 Min.   :  2.00    Min.   :  9.0      Min.   :0.9871   Min.   :2.720   Min.   :0.2200  
 1st Qu.: 23.00    1st Qu.:108.0      1st Qu.:0.9917   1st Qu.:3.090   1st Qu.:0.4100  
 Median : 34.00    Median :134.0      Median :0.9937   Median :3.180   Median :0.4700  
 Mean   : 35.31    Mean   :138.4      Mean   :0.9940   Mean   :3.188   Mean   :0.4898  
 3rd Qu.: 46.00    3rd Qu.:167.0      3rd Qu.:0.9961   3rd Qu.:3.280   3rd Qu.:0.5500  
 Max.   :289.00    Max.   :440.0      Max.   :1.0140   Max.   :3.820   Max.   :1.0800  
    alcohol         quality        Vinho     
 Min.   : 8.00   Min.   :3.000   RED  :   0  
 1st Qu.: 9.50   1st Qu.:5.000   WHITE:4898  
 Median :10.40   Median :6.000               
 Mean   :10.51   Mean   :5.878               
 3rd Qu.:11.40   3rd Qu.:6.000               
 Max.   :14.20   Max.   :9.000

Vamos agora seguir com nossa análise utilizando apenas os vinhos brancos. Como boa parte da análise exploratória já foi realizada nos outros markdowns, vamos analisar apenas o que restou: outliers, PCA e a variância.

Com toda a análise feita, finalmente poderemos aplicar modelos preditivos.

Tratamento para Outliers

Precisamos entender os outliers, pois eles podem ter um impacto direto em nossa predição posteriormente. Vamos trabalhar com 1,5 vezes a distância interquartílica em cada campo(Entre 25% a 75% dos dados) utilizando uma abordagem univariável para variáveis contínuas.

Detectando os Outliers univariavelmente

Acidez Fixa

plot_ly(y=wines_dt.white_wines$fixedacidity, main='fixedacidity', type = 'box', name = 'Acidez Fixa')
replacing previous import by ‘Rcpp::evalCpp’ when loading ‘later’replacing previous import by ‘shiny::validateCssUnit’ when loading ‘crosstalk’replacing previous import by ‘shiny::br’ when loading ‘crosstalk’replacing previous import by ‘shiny::tags’ when loading ‘crosstalk’replacing previous import by ‘shiny::div’ when loading ‘crosstalk’replacing previous import by ‘shiny::h1’ when loading ‘crosstalk’replacing previous import by ‘shiny::h2’ when loading ‘crosstalk’replacing previous import by ‘shiny::h3’ when loading ‘crosstalk’replacing previous import by ‘shiny::h4’ when loading ‘crosstalk’replacing previous import by ‘shiny::h5’ when loading ‘crosstalk’replacing previous import by ‘shiny::h6’ when loading ‘crosstalk’replacing previous import by ‘shiny::knit_print.html’ when loading ‘crosstalk’replacing previous import by ‘shiny::tagSetChildren’ when loading ‘crosstalk’replacing previous import by ‘shiny::includeScript’ when loading ‘crosstalk’replacing previous import by ‘shiny::em’ when loading ‘crosstalk’replacing previous import by ‘shiny::tagAppendChild’ when loading ‘crosstalk’replacing previous import by ‘shiny::is.singleton’ when loading ‘crosstalk’replacing previous import by ‘shiny::includeHTML’ when loading ‘crosstalk’replacing previous import by ‘shiny::includeMarkdown’ when loading ‘crosstalk’replacing previous import by ‘shiny::code’ when loading ‘crosstalk’replacing previous import by ‘shiny::tagList’ when loading ‘crosstalk’replacing previous import by ‘shiny::a’ when loading ‘crosstalk’replacing previous import by ‘shiny::tagAppendAttributes’ when loading ‘crosstalk’replacing previous import by ‘shiny::singleton’ when loading ‘crosstalk’replacing previous import by ‘shiny::hr’ when loading ‘crosstalk’replacing previous import by ‘shiny::p’ when loading ‘crosstalk’replacing previous import by ‘shiny::suppressDependencies’ when loading ‘crosstalk’replacing previous import by ‘shiny::tagAppendChildren’ when loading ‘crosstalk’replacing previous import by ‘shiny::includeText’ when loading ‘crosstalk’replacing previous import by ‘shiny::pre’ when loading ‘crosstalk’replacing previous import by ‘shiny::span’ when loading ‘crosstalk’replacing previous import by ‘shiny::withTags’ when loading ‘crosstalk’replacing previous import by ‘shiny::htmlTemplate’ when loading ‘crosstalk’replacing previous import by ‘shiny::img’ when loading ‘crosstalk’replacing previous import by ‘shiny::tag’ when loading ‘crosstalk’replacing previous import by ‘shiny::includeCSS’ when loading ‘crosstalk’replacing previous import by ‘shiny::knit_print.shiny.tag’ when loading ‘crosstalk’replacing previous import by ‘shiny::knit_print.shiny.tag.list’ when loading ‘crosstalk’replacing previous import by ‘shiny::strong’ when loading ‘crosstalk’replacing previous import by ‘shiny::HTML’ when loading ‘crosstalk’'box' objects don't have these attributes: 'main'
Valid attributes include:
'type', 'visible', 'showlegend', 'legendgroup', 'opacity', 'name', 'uid', 'ids', 'customdata', 'selectedpoints', 'hoverinfo', 'hoverlabel', 'stream', 'transforms', 'y', 'x', 'x0', 'y0', 'text', 'whiskerwidth', 'notched', 'notchwidth', 'boxpoints', 'boxmean', 'jitter', 'pointpos', 'orientation', 'marker', 'line', 'fillcolor', 'selected', 'unselected', 'hoveron', 'xcalendar', 'ycalendar', 'xaxis', 'yaxis', 'idssrc', 'customdatasrc', 'hoverinfosrc', 'ysrc', 'xsrc', 'textsrc', 'key', 'set', 'frame', 'transforms', '_isNestedKey', '_isSimpleKey', '_isGraticule', '_bbox'
'box' objects don't have these attributes: 'main'
Valid attributes include:
'type', 'visible', 'showlegend', 'legendgroup', 'opacity', 'name', 'uid', 'ids', 'customdata', 'selectedpoints', 'hoverinfo', 'hoverlabel', 'stream', 'transforms', 'y', 'x', 'x0', 'y0', 'text', 'whiskerwidth', 'notched', 'notchwidth', 'boxpoints', 'boxmean', 'jitter', 'pointpos', 'orientation', 'marker', 'line', 'fillcolor', 'selected', 'unselected', 'hoveron', 'xcalendar', 'ycalendar', 'xaxis', 'yaxis', 'idssrc', 'customdatasrc', 'hoverinfosrc', 'ysrc', 'xsrc', 'textsrc', 'key', 'set', 'frame', 'transforms', '_isNestedKey', '_isSimpleKey', '_isGraticule', '_bbox'

Volatilidade do Ácido

plot_ly(y=wines_dt.white_wines$volatileacidity, main='residualsugar', type = 'box', name = 'Volatilidade do Ácido')
'box' objects don't have these attributes: 'main'
Valid attributes include:
'type', 'visible', 'showlegend', 'legendgroup', 'opacity', 'name', 'uid', 'ids', 'customdata', 'selectedpoints', 'hoverinfo', 'hoverlabel', 'stream', 'transforms', 'y', 'x', 'x0', 'y0', 'text', 'whiskerwidth', 'notched', 'notchwidth', 'boxpoints', 'boxmean', 'jitter', 'pointpos', 'orientation', 'marker', 'line', 'fillcolor', 'selected', 'unselected', 'hoveron', 'xcalendar', 'ycalendar', 'xaxis', 'yaxis', 'idssrc', 'customdatasrc', 'hoverinfosrc', 'ysrc', 'xsrc', 'textsrc', 'key', 'set', 'frame', 'transforms', '_isNestedKey', '_isSimpleKey', '_isGraticule', '_bbox'
'box' objects don't have these attributes: 'main'
Valid attributes include:
'type', 'visible', 'showlegend', 'legendgroup', 'opacity', 'name', 'uid', 'ids', 'customdata', 'selectedpoints', 'hoverinfo', 'hoverlabel', 'stream', 'transforms', 'y', 'x', 'x0', 'y0', 'text', 'whiskerwidth', 'notched', 'notchwidth', 'boxpoints', 'boxmean', 'jitter', 'pointpos', 'orientation', 'marker', 'line', 'fillcolor', 'selected', 'unselected', 'hoveron', 'xcalendar', 'ycalendar', 'xaxis', 'yaxis', 'idssrc', 'customdatasrc', 'hoverinfosrc', 'ysrc', 'xsrc', 'textsrc', 'key', 'set', 'frame', 'transforms', '_isNestedKey', '_isSimpleKey', '_isGraticule', '_bbox'

Ácido Cítrico

plot_ly(y=wines_dt.white_wines$citricacid, main='citricacid', type = 'box', name = 'Ácido Cítrico')

Açúcar Residual

plot_ly(y=wines_dt.white_wines$residualsugar, main='residualsugar', type = 'box', name = 'Açúcar Residual')

Cloretos

plot_ly(y=wines_dt.white_wines$chlorides, main='chlorides', type = 'box', name = 'Cloretos')

Dióxido de Enxofre Livre

plot_ly(y=wines_dt.white_wines$freesulfurdioxide, main='freesulfurdioxide', type = 'box', name = 'Dióxido de Enxofre Livre')

Total de Dióxido de Enxofre

plot_ly(y=wines_dt.white_wines$totalsulfurdioxide, main='totalsulfurdioxide', type = 'box', name = 'Total de Dióxido de Enxofre')
'box' objects don't have these attributes: 'main'
Valid attributes include:
'type', 'visible', 'showlegend', 'legendgroup', 'opacity', 'name', 'uid', 'ids', 'customdata', 'selectedpoints', 'hoverinfo', 'hoverlabel', 'stream', 'transforms', 'y', 'x', 'x0', 'y0', 'text', 'whiskerwidth', 'notched', 'notchwidth', 'boxpoints', 'boxmean', 'jitter', 'pointpos', 'orientation', 'marker', 'line', 'fillcolor', 'selected', 'unselected', 'hoveron', 'xcalendar', 'ycalendar', 'xaxis', 'yaxis', 'idssrc', 'customdatasrc', 'hoverinfosrc', 'ysrc', 'xsrc', 'textsrc', 'key', 'set', 'frame', 'transforms', '_isNestedKey', '_isSimpleKey', '_isGraticule', '_bbox'
'box' objects don't have these attributes: 'main'
Valid attributes include:
'type', 'visible', 'showlegend', 'legendgroup', 'opacity', 'name', 'uid', 'ids', 'customdata', 'selectedpoints', 'hoverinfo', 'hoverlabel', 'stream', 'transforms', 'y', 'x', 'x0', 'y0', 'text', 'whiskerwidth', 'notched', 'notchwidth', 'boxpoints', 'boxmean', 'jitter', 'pointpos', 'orientation', 'marker', 'line', 'fillcolor', 'selected', 'unselected', 'hoveron', 'xcalendar', 'ycalendar', 'xaxis', 'yaxis', 'idssrc', 'customdatasrc', 'hoverinfosrc', 'ysrc', 'xsrc', 'textsrc', 'key', 'set', 'frame', 'transforms', '_isNestedKey', '_isSimpleKey', '_isGraticule', '_bbox'

outliers_residual_sugar <-quantile(wines_dt.white_wines$residualsugar,.75,type=2)-quantile(wines_dt.white_wines$residualsugar,.25,type=2)
outliers_residual_sugar
75% 
8.2

Densidade

plot_ly(y=wines_dt.white_wines$density, main='density', type = 'box', name = 'Densidade')

pH

plot_ly(y=wines_dt.white_wines$pH, main='pH', type = 'box', name = 'pH')

Sulfatos

plot_ly(y=wines_dt.white_wines$sulphates, main='sulphates', type = 'box', name = 'Sulfatos')
'box' objects don't have these attributes: 'main'
Valid attributes include:
'type', 'visible', 'showlegend', 'legendgroup', 'opacity', 'name', 'uid', 'ids', 'customdata', 'selectedpoints', 'hoverinfo', 'hoverlabel', 'stream', 'transforms', 'y', 'x', 'x0', 'y0', 'text', 'whiskerwidth', 'notched', 'notchwidth', 'boxpoints', 'boxmean', 'jitter', 'pointpos', 'orientation', 'marker', 'line', 'fillcolor', 'selected', 'unselected', 'hoveron', 'xcalendar', 'ycalendar', 'xaxis', 'yaxis', 'idssrc', 'customdatasrc', 'hoverinfosrc', 'ysrc', 'xsrc', 'textsrc', 'key', 'set', 'frame', 'transforms', '_isNestedKey', '_isSimpleKey', '_isGraticule', '_bbox'
'box' objects don't have these attributes: 'main'
Valid attributes include:
'type', 'visible', 'showlegend', 'legendgroup', 'opacity', 'name', 'uid', 'ids', 'customdata', 'selectedpoints', 'hoverinfo', 'hoverlabel', 'stream', 'transforms', 'y', 'x', 'x0', 'y0', 'text', 'whiskerwidth', 'notched', 'notchwidth', 'boxpoints', 'boxmean', 'jitter', 'pointpos', 'orientation', 'marker', 'line', 'fillcolor', 'selected', 'unselected', 'hoveron', 'xcalendar', 'ycalendar', 'xaxis', 'yaxis', 'idssrc', 'customdatasrc', 'hoverinfosrc', 'ysrc', 'xsrc', 'textsrc', 'key', 'set', 'frame', 'transforms', '_isNestedKey', '_isSimpleKey', '_isGraticule', '_bbox'

Álcool

plot_ly(y=wines_dt.white_wines$alcohol, main='alcohol', type = 'box', name = 'Álcool')
'box' objects don't have these attributes: 'main'
Valid attributes include:
'type', 'visible', 'showlegend', 'legendgroup', 'opacity', 'name', 'uid', 'ids', 'customdata', 'selectedpoints', 'hoverinfo', 'hoverlabel', 'stream', 'transforms', 'y', 'x', 'x0', 'y0', 'text', 'whiskerwidth', 'notched', 'notchwidth', 'boxpoints', 'boxmean', 'jitter', 'pointpos', 'orientation', 'marker', 'line', 'fillcolor', 'selected', 'unselected', 'hoveron', 'xcalendar', 'ycalendar', 'xaxis', 'yaxis', 'idssrc', 'customdatasrc', 'hoverinfosrc', 'ysrc', 'xsrc', 'textsrc', 'key', 'set', 'frame', 'transforms', '_isNestedKey', '_isSimpleKey', '_isGraticule', '_bbox'
'box' objects don't have these attributes: 'main'
Valid attributes include:
'type', 'visible', 'showlegend', 'legendgroup', 'opacity', 'name', 'uid', 'ids', 'customdata', 'selectedpoints', 'hoverinfo', 'hoverlabel', 'stream', 'transforms', 'y', 'x', 'x0', 'y0', 'text', 'whiskerwidth', 'notched', 'notchwidth', 'boxpoints', 'boxmean', 'jitter', 'pointpos', 'orientation', 'marker', 'line', 'fillcolor', 'selected', 'unselected', 'hoveron', 'xcalendar', 'ycalendar', 'xaxis', 'yaxis', 'idssrc', 'customdatasrc', 'hoverinfosrc', 'ysrc', 'xsrc', 'textsrc', 'key', 'set', 'frame', 'transforms', '_isNestedKey', '_isSimpleKey', '_isGraticule', '_bbox'

Variância

PCA

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